1) A function provided by the MIDIbox SID to produce fat pulse sounds — or — 2) Allows to control a voltage level by pulsing a binary digital signal (ON/OFF) through a low-pass filter (e.g. a resistor/capacitor pair — or a motor fader)

Negative Voltage eg: 0V Reference. Also called “Ground”, “Gnd”, “Shield”, and less often, “Earth” or “Chassis”. Usually in an audio application, the 0V line is connected to the chassis. This 0V line is particularly susceptible to noise, so care should be taken with wiring this line. Name refers to the 'source' 'emitting' electrons (negatively charged) into the circuit.